attempt 2 to make it work on arm windows

Author: YoavCodes

.github/workflows/release.yml

@@ -66,11 +66,16 @@ jobs:
 
       - name: Build binaries
         run: |
-          zig build -Doptimize=ReleaseFast ${{ matrix.platform == 'win32' && '-Dtarget=x86_64-windows-msvc' || '' }}
+          zig build -Doptimize=ReleaseFast
+
+      - name: Rebuild bspatch with MSVC ABI (Windows)
+        if: matrix.platform == 'win32'
+        run: |
+          zig build bspatch-only -Doptimize=ReleaseFast -Dtarget=x86_64-windows-msvc
 
       - name: Test
         run: |
-          zig build test ${{ matrix.platform == 'win32' && '-Dtarget=x86_64-windows-msvc' || '' }}
+          zig build test
 
       - name: Package binaries
         run: |

build.zig

@@ -83,6 +83,11 @@ pub fn build(b: *std.Build) void {
 
     b.installArtifact(bspatch);
 
+    // Separate step to build only bspatch (used on Windows CI to rebuild with MSVC ABI
+    // without triggering bsdiff's libsais link which requires MinGW)
+    const bspatch_only = b.step("bspatch-only", "Build only bspatch");
+    bspatch_only.dependOn(&b.addInstallArtifact(bspatch, .{}).step);
+
     const tests = b.addTest(.{
         .root_source_file = b.path("tests.zig"),
         .target = target,